I'd cosign buffing our self-cast enhancing spells and putting more emphasis on self-cast enhancing spells (specially ones that help us in melee) way before I'd want to buff the support-type spells. Buffing enspells, giving us Saber, Double/Triple and finishing the Gain line of spells (and lowering the level req for them, as lv81 makes them seem lackluster) are more in line with what we can do in enhancing.

If you want masters of buffing, you need not look further than Bard and Corsair. Let them have and keep the party buff role.